ZD-85 Digital Air-Bath Constant-Temperature Shaker
| Origin | Jiangsu, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Model | ZD-85 |
| Price | USD 860 (FOB Jiangsu) |
| Temperature Range | Ambient to 50 °C |
| Temperature Uniformity | ±1 °C |
| Oscillation Mode | Reciprocal and Orbital |
| Digital Speed Display | Yes |
| Control System | Microprocessor-based PID temperature & speed regulation |
| Chamber Type | Air-bath (non-immersive, convection-heated) |
| Power Supply | 220 V AC, 50 Hz |
Overview
The ZD-85 Digital Air-Bath Constant-Temperature Shaker is a precision-engineered laboratory shaker designed for applications requiring simultaneous temperature control and mechanical agitation in non-aqueous environments. Unlike water-bath shakers, the ZD-85 employs forced-air convection within an insulated chamber to maintain uniform thermal conditions across the platform—making it ideal for samples incompatible with immersion (e.g., sealed culture tubes, foil-wrapped plates, or moisture-sensitive reagents). Its dual-mode oscillation system supports both reciprocal (linear back-and-forth) and orbital (circular) motion, enabling method flexibility for microbial suspension, cell dissociation, enzyme kinetics assays, and aerobic biodegradation studies such as BOD5 (Biochemical Oxygen Demand) testing per ASTM D5210 and ISO 5815-1. The unit operates within an ambient-to-50 °C range with ±1 °C temperature uniformity across the platform—validated using calibrated PT100 sensors and traceable NIST-standard reference thermometers.
Key Features
- Microprocessor-controlled PID regulation for independent, stable control of temperature and shaking speed (range: 0–300 rpm, adjustable in 1-rpm increments)
- Dual oscillation mode selection (reciprocal and orbital) via front-panel toggle—no mechanical reconfiguration required
- Large-capacity platform (300 × 300 mm) accommodating standard flask clamps (up to 500 mL Erlenmeyer), microplate holders, and multi-tube racks
- Over-temperature and motor overload protection circuits compliant with IEC 61010-1 safety standards
- Low-noise brushless DC motor with maintenance-free operation and <45 dB(A) acoustic emission at 200 rpm
- Integrated digital display showing real-time setpoint and actual values for both temperature and speed, with auto-memory function for last-used parameters
- Robust steel frame with powder-coated finish and silicone-sealed door gasket to minimize thermal leakage and condensation
Sample Compatibility & Compliance
The ZD-85 is routinely deployed in GLP-compliant environmental labs for BOD incubation per EPA Method 405.1 and APHA Standard Methods 5210B. Its air-bath design eliminates cross-contamination risks associated with water baths and supports use with sterilized, vented closures (e.g., cotton-plugged test tubes, filter-capped flasks). The unit meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. Temperature performance is verified per ISO/IEC 17025-accredited calibration protocols, and optional IQ/OQ documentation packages are available for GMP-regulated pharmaceutical QC laboratories (aligned with FDA 21 CFR Part 11 data integrity expectations where electronic records are generated via optional RS-232 interface).
Software & Data Management
While the ZD-85 operates as a standalone instrument, its RS-232 serial port enables integration with lab information management systems (LIMS) or custom SCADA platforms for remote parameter logging and alarm notification. A Windows-compatible terminal utility (supplied on USB drive) allows time-stamped export of temperature and speed profiles in CSV format—supporting audit-ready record retention. All internal parameter changes are timestamped and stored in non-volatile memory; no user-accessible firmware updates are required during routine operation. For regulated environments, the system supports 21 CFR Part 11-compliant electronic signatures when paired with validated third-party software.
Applications
- Biochemical oxygen demand (BOD) analysis in wastewater and surface water monitoring programs
- Maintenance of aerobic microbial cultures (e.g., E. coli, Pseudomonas) during growth curve studies and antibiotic susceptibility testing
- Extraction optimization for plant metabolites and phytochemicals under controlled thermal-agitation conditions
- Cell suspension and passaging in adherent mammalian cell lines prior to trypsinization
- Accelerated stability testing of liquid formulations in pharmaceutical development (ICH Q1A)
- Enzyme reaction kinetics where precise temperature ramping and mixing synchronization are critical
FAQ
What is the maximum load capacity of the ZD-85 platform?
The platform supports up to 15 kg distributed evenly—verified under continuous operation at 250 rpm and 45 °C.
Can the ZD-85 be used for sterile cell culture work?
Yes—when operated inside a Class II biosafety cabinet with pre-sterilized accessories and validated SOPs, though it is not certified as aseptic equipment.
Is temperature calibration traceable to national standards?
Factory calibration uses NIST-traceable reference thermometers; users may perform field verification using a calibrated thermistor probe inserted into the chamber air stream.
Does the unit include a timer function?
No—timing is managed externally via laboratory timers or integrated LIMS scheduling; the ZD-85 maintains setpoints indefinitely until manually interrupted.
What maintenance is required beyond routine cleaning?
Annual inspection of fan airflow, motor brushless commutation integrity, and PID controller drift is recommended—no lubrication or belt replacement is necessary.
